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Electronic Supplementary Material (ESM) for:
Rheological study on counterion (X2-)– and temperature-induced cationic
micellar growth: A quantitative correlation between X2- binding affinity to
cationic micelles and X2-- and temperature-induced micellar growth
Norazizah A. Razak and M. Niyaz Khan ()
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Fig. S1 Plots showing the dependence of shear viscosity (η) upon shear rate ( ) for samples
where [PSaH] = 0.2 mM, [NaOH] = 0.03 M, [Pip] = 0.1M, [CTABr] T = 15 mM, and [3MeSaNa2]/mM= (a): 0.5 (●), 10 (▲), 11 (♦), 12 (○), 15 (∆), 20 (◊) and 30 (×) as well as (b): 40
(●), 50 (▲),100 (♦), 150 (○), 200 (∆), 250 (◊) and 300 (×) at 35°C.
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Fig. S2 Elastic modulus, G’ (●), viscous modulus, G” (○) and complex viscosity, * (▲) vs.
oscillatory shear frequency () at a constant [M2X] = 12 mM 3-MeSaNa2, 15 mM CTABr, 0.2
mM PSaH, 0.03 M NaOH, 0.1 M Pip and 35 oC.
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Fig. S3 Plots showing the dependence of zero shear viscosity (η0) vs. [M2X], (= 4-MeSaNa2), for
samples with [PSaH] = 0.2 mM, [NaOH] = 0.03 M, [Pip] = 0.1 M, and [CTABr] T = 15 mM at
35°C (●), 40°C (○), 45°C (▲), and 55°C (×).
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Fig. S4 Plots showing the dependence of ln η0 vs. 1/T for samples with [PSaH] = 0.2 mM,
[NaOH] = 0.03 M, [Pip] = 0.1 M, and [CTABr] T = 15 mM at various concentrations of M2X
where (a): [4-MeOSaNa2]/mM = 10 (●), 15 (○), 20 (▲), 40 (), 70 (♦), 100 (+); and (b): [4MeSaNa2]/mM = 10 (●), 12 (○), 14 (▲), 15 (), 30-40 (∆), 100 (♦), 150 (+), 300 (■) at 35 – 55
°C. The solid lines are drawn through the calculated data points using Eq. 1 with ln A and Ea
listed in Table 3.
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Fig. S5 Plots showing the dependence of ln η0 vs. 1/T for samples with [PSaH] = 0.2 mM,
[NaOH] = 0.03 M, [Pip] = 0.1 M, and [CTABr] T = 15 mM at various concentrations of M2X
where [3-MeSaNa2]/mM = 12 (●), 40 (▲) and 80 (♦) at 20 – 55 °C. The solid and dotted lines
are drawn through the calculated data points using Eq. 1 with ln A and Ea listed in Table 3.
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Fig. S6 (a): Plots showing the dependence of zero shear viscosity (○) upon temperature of M2X =
3-MeSaNa2 at which the first viscosity maxima occurs at 15 mM CTABr and (b): Plots showing
the dependence of zero shear viscosity (○) upon temperature at specific concentration of M2X =
3-MeSaNa2 at which the second viscosity maximum occurs at 15 mM CTABr.